air locker

I had a High Pinion Diff built with Yukon 5.29 gears, Yukon master install kit, and a Zip locker years ago. 4 kids in under 6 years (#5 on the way in June) and I haven't wheeled for years. In fact I'll be selling my Toyota soon. This 3rd has just sat in a bucket the entire time, never used. It...